package/libcec: bump version to 7.1.0
Changelog:
https://github.com/Pulse-Eight/libcec/blob/libcec-7.1.0/debian/changelog.in
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[Julien: switch changelog link to use the tag]
Signed-off-by: Julien Olivain <ju.o@free.fr>